21332010023220 has 288 divisors, whose sum is σ = 65219245314048. Its totient is φ = 5207027245056.

The previous prime is 21332010023213. The next prime is 21332010023381. The reversal of 21332010023220 is 2232001023312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4580631132 + ... + 4580635788.

It is an arithmetic number, because the mean of its divisors is an integer number (226455712896).

Almost surely, 2^{21332010023220} is an apocalyptic number.

21332010023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21332010023220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32609622657024).

21332010023220 is an abundant number, since it is smaller than the sum of its proper divisors (43887235290828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21332010023220 is a wasteful number, since it uses less digits than its factorization.

21332010023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8379 (or 8364 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21332010023220 its reverse (2232001023312), we get a palindrome (23564011046532).

The spelling of 21332010023220 in words is "twenty-one trillion, three hundred thirty-two billion, ten million, twenty-three thousand, two hundred twenty".